filter
(1)过滤
(2)滤光器，滤光片，滤光镜
(3)滤波器
(4)过滤器

• tungsten strip lamp
• tuning
• tuning dial
• tuning eye
• tuning fork
• T-union
• tunnel
• tunnel diagram
• tunnel diagram of prism
• tunnel diode
• tunnel effect
• tunneling
• tunneling leaky mode
• tunnel-injection laser
• tunnel photodiode
• turbidity
• turbid medium
• turbine
• turbulence
• turbulence detector
• turbulence effect
• turbulent distortion
• turbulent flow
• turbulent medium
• turn